Opus specifically talks as if having a stroke. 4.6 was the last version that was pleasant to work with

I couldn't even stand 4.6 by the end. 4.5 was very usable, 4.6 started alright and somehow got more annoying. 4.7 made me quit my subscription and ditch their services entirely - it's an honourary member of my quite short "Coworkers I'd like to throttle if I didn't work remotely" list. Infuriating to instruct or communicate with.